diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2007-09-21 18:13:55 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-09-24 19:13:02 +0200 |
| commit | 1146fe30504a1edd8a434f500e1be139492570c9 (patch) | |
| tree | ba6dec916c23506580be7a5756dd583105da41ba /include/asm-mips | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rol... (diff) | |
| download | linux-1146fe30504a1edd8a434f500e1be139492570c9.tar.xz linux-1146fe30504a1edd8a434f500e1be139492570c9.zip | |
[MIPS] SMTC: Make ack_bad_irq() safe with no IM backstop.
Issue reported and original patch by Kevin Kissel, cleaner (imho)
implementation by me.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips')
| -rw-r--r-- | include/asm-mips/irq.h | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/include/asm-mips/irq.h b/include/asm-mips/irq.h index 97102ebc54b1..2cb52cf8bd4e 100644 --- a/include/asm-mips/irq.h +++ b/include/asm-mips/irq.h @@ -24,7 +24,30 @@ static inline int irq_canonicalize(int irq) #define irq_canonicalize(irq) (irq) /* Sane hardware, sane code ... */ #endif +#ifdef CONFIG_MIPS_MT_SMTC + +struct irqaction; + +extern unsigned long irq_hwmask[]; +extern int setup_irq_smtc(unsigned int irq, struct irqaction * new, + unsigned long hwmask); + +static inline void smtc_im_ack_irq(unsigned int irq) +{ + if (irq_hwmask[irq] & ST0_IM) + set_c0_status(irq_hwmask[irq] & ST0_IM); +} + +#else + +static inline void smtc_im_ack_irq(unsigned int irq) +{ +} + +#endif /* CONFIG_MIPS_MT_SMTC */ + #ifdef CONFIG_MIPS_MT_SMTC_IM_BACKSTOP + /* * Clear interrupt mask handling "backstop" if irq_hwmask * entry so indicates. This implies that the ack() or end() @@ -38,6 +61,7 @@ do { \ ~(irq_hwmask[irq] & 0x0000ff00)); \ } while (0) #else + #define __DO_IRQ_SMTC_HOOK(irq) do { } while (0) #endif @@ -60,14 +84,6 @@ do { \ extern void arch_init_irq(void); extern void spurious_interrupt(void); -#ifdef CONFIG_MIPS_MT_SMTC -struct irqaction; - -extern unsigned long irq_hwmask[]; -extern int setup_irq_smtc(unsigned int irq, struct irqaction * new, - unsigned long hwmask); -#endif /* CONFIG_MIPS_MT_SMTC */ - extern int allocate_irqno(void); extern void alloc_legacy_irqno(void); extern void free_irqno(unsigned int irq); |